#define _CRT_SECURE_NO_WARNINGS
#include <string.h>
#include <stdio.h>
#include <ctype.h>

int main() {
	int i = 0;
	char str[100];
	scanf("%s", str);
	while (str[i] != '@') 
		
			while (str[i] != '@') {
				if (isalpha(str[i])) {
					if (isupper(str[i])) {
						str[i] += 32;
					}
					if (str[i] >= 'a' && str[i] < 'z') {
						str[i]++;
					}
					else if (str[i] == 'z') {
						str[i] = 'a';
					}
				}

			printf("%c", str[i++]);
		}
	
	return 0;
}